Loss of a PSAP occurs when

• A. The facility housing the PSAP is destroyed or so severely damaged that the operation of the PSAP is not possible.
• B. An interruption or break in the communication links
• C. Failure of the DBMS
• D. End office isolation

Answer: (B)

A PSAP stops functioning when the path that carries 911 calls to it is disrupted. If there is an interruption or break in the communication links, calls cannot reach the PSAP, so it cannot receive or process emergency requests. That immediate loss of the ability to handle 911 traffic defines a loss of PSAP.

While a facility can be damaged and a DBMS can fail, those situations either trigger relocation or affect data handling, not the essential ability to receive calls. End office isolation is a specific example of a link problem, but the broader and most directly relevant issue is the interruption of the communication links themselves.